HeardThat is a speech-enhancement app that uses artificial intelligence to separate noise from speech, making conversations clearer and easier to follow. It can be used with a smartphone and existing hearing aids or earphones, and is easy to use. The app uses machine learning to identify the difference between noise and speech, and separates the noise to leave only the speech. This makes it more precise than traditional speech assistive devices, which either amplify everything or reduce both noise and speech. HeardThat's approach is a breakthrough in improving speech in noisy environments.